public ElfFile(MemoryStream stream)
{
//load main file header
ElfHeader = new Elf32Ehdr((Elf32_Ehdr *)stream.Pointer);
//load section headers
var header = (Elf32_Shdr *)(stream.Pointer + ElfHeader.Shoff);
for (int i = 0; i < ElfHeader.Shnum; i++)
{
var x = new Elf32Shdr(&header[i]);
if (x.Type == SectionType.StringTable)
{
_stringTables.Add(x.Offset);
}
SectionHeaders.Add(x);
}
//now we can load names into symbols and process sub data
for (var index = 0; index < SectionHeaders.Count; index++)
{
var sectionHeader = SectionHeaders[index];
sectionHeader.Name = ResolveName(sectionHeader, sectionHeader.NameOffset, stream);
switch (sectionHeader.Type)
{
case SectionType.Relocation:
for (int i = 0; i < sectionHeader.Size / sectionHeader.Entsize; i++)
{
RelocationInformation.Add(new Elf32Rel(
(Elf32_Rel *)(stream.Pointer + sectionHeader.Offset + i * sectionHeader.Entsize))
{
Section = index
});
}
break;
case SectionType.SymbolTable:
for (int i = 0; i < sectionHeader.Size / sectionHeader.Entsize; i++)
{
var x = new Elf32Sym(
(Elf32_Sym *)(stream.Pointer + sectionHeader.Offset + i * sectionHeader.Entsize));
x.Name = ResolveName(sectionHeader, x.NameOffset, stream);
Symbols.Add(x);
}
break;
}
}
}
public string ResolveName(Elf32Shdr section, uint offset, MemoryStream stream)
{
var old = stream.Posistion;
if (section.Type != SectionType.SymbolTable)
{
stream.Posistion = _stringTables[0] + offset;
}
else
{
stream.Posistion = _stringTables[1] + offset;
}
var reader = new BinaryReader(stream);
var s = reader.ReadString();
stream.Posistion = old;
return(s);
}
